I do the same thing. If 0 percent is offered I use their money and make sure it’s paid off.
I have one working now that $3k is left on and am in the process of another that will have $8k on it.
They’ll both be paid off so we don’t spend 1 cent on interest.
That is great. I actually make money on the credit cards I use. I get 1.5 percent back which is actually more then the banks are paying. I think it is a good deal in a way.